Soil-coring tool



May 29, 1923.

c. c. HANSEN SOIL CORING TOOL Filed Nov. 2

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INVEN .llnllllii'llli-Illl-li...

. 0 u III/IVE H15 ATTOR EY cnAELEso. HANSEN, or EASTON, rENNsYLvAmA, 'AssmNon 'ro ING RSOLL-EAND COMPANY, or JERSEY CITY, NEW JERSEY, A CORPORATION or NEW JERSEY.

' SOIL-CURING- TOOL.

Application filed November 2, 1921. Serial No. 512,289.

To all whom it may concern: l

Be it knownthatl, CHARLES C. HANsE a citizen of the United States, and a resident of Easton, county of Northampton,

State-of Pennsylvania, have invented a cer- 'tain Soil-Goring Tool, of which the following is a specification, accompanied by drawin s.

lhis invention relates to soil coring tools, andparticularly to a tool in the nature of of a core drill of this general type adapted to extract cores from earth or other material which is-more or less dry and loose in formation.

Heretofore it has been extremely difiicult to obtain satisfactory specimens of earth fortracting such combined specimens by loosen ing the material and conveying it as cut into 9 a so-called calyx bit by hydraulicmeans, a reversed loose core being thus obtained, but this method has many drawbacks and is moreover expensive:

The object of the present invention is to eiiiciently and expeditiously extract cores composed of loose earthor other incohesive material,-to protect the core while the tool is being advanced, toconvey the dbris from the hole during the drilling, and to permit the core barrel to be detachably mounted in the drill so that the operating parts may be quickly removed from the core barrel, after which the core-barrel and its contained core may be readily removed from the hole.

Further objects of the invention will hereinafter appear, and to all of these ends the invention consists of a soil coring tool having the features of construction, arrangement of artsand combinations of elements substantially as hereinafter fully described and claimed in this specification and shown in the accompanying drawing, in which:

Figure 1, is a ongitudinal sectional elevation of a preferred form of the drill as it appears in operation,

1 barrel,

Fi re 9 is a fr enta elevation of the lowei bnd of the d i ill shdzving the cutting edges of the bit and the lower end of the core Figure 3, isaview similar to Figure 2 of portions of the head piece and core barrel shpiwing the connection between these parts, an

Figure 4, is a. side elevation partly broken away and partly in longitudinal section showing a modified form of core barrel.

In the drawings I have shown a core drill having a rotatable spindle A, a cap piece B a casing B rotated through the agency of the spindle A, and an outer cylindrical cutting bit 0 preferably threaded to the casing B and rotatable therewith. Within the bit C is a normally non-rotatable core barrel D. This core barrel D is detachably mounted upon a normally stationary support which consists of a housing E and a head piece F secured in the housing E, the core barrel D being secured to the head piece F by a separable connection which may be in the form of a bayonet joint formed by the slot G on the eorebarrel and the piece F.

A spiral conveyor H- is formed on the inner wall of the cutting bit C for removing the debris as the bit rotates during the progress of the drilling operation, the edges of the conveyor being spaced sufficiently from the wall of the core barrel D to prevent any frictional contact with the barrel D which might tend to rotate it,

The cap piece B the housing E and'the head piece F are norn lly held stationary and nonmetatable by a handle K secured to the cap piece B When the drilling of the hole has been completed, and it is desired to extract the core, the handle K is manipulated to partially rotate the cap piece B this movement being effected independently of the spindle and having the effect of also imparting rotative movement to the housing E and the head piece F, with the result that the pin L on the head piece moves in the pin L on the head.

slot G of the core barrel D to unlock the I fltationof the casing and bit 0 include a gear J onthe spindle A, this gear rotating in a chamber in the upper portion of the cap iece BK, The spindle A has a head portion fitted into a recess S in the under side of the cap piece 13 and bearing against 'shouldersT forming the back of the recess S. The head piece F is rigidly secured in. the housing E so that it does not rotate with, respect'to the housing E, by means of a head U threaded to the squared neck Vof the head piece F and secured ina'recess W in the housing E,

The casing B rotates onthe head piece F through the interposition of a ball bearing comprising the bearing blocks X and balls Y. Another ball bearing formed by the balls a is locatedbetween the heads R and r i U on the spindle A and neck ot the head piece F, respectively, forming an end bearing for the spindle A and also serving to prevent the transmission of rotative movement from the spindle to the head piece F..

The head U it will be seen is threaded to the squared neck V so that it is adjustable to raise and lower the head piece F within small limits to obtain the proper adjustment between the head piece F, casing B and housing E.

A longitudinal shaft 5 is mounted adjacent the spindle A, having pinions d and e one at each end. The driving gear J on the spindle A meshes with the pinion'd while the pinion e in turn meshes with aninternal gear 7 formed within the casing B. Since the shaft 7) passes throiwh both the cap iece B and housin E. re ative rotationof P s the cap and housing is prevented. The housing E is preferably formed with a down turned flange g overlapping the upper end of the casing B, thus enclosing and protect ing the internal gearing.

The bit C has the usual cutting edges h at the lower end and at the upper end openings j are provided for the escape of cuttings carried up by the spiral conveyor H.

A longitudinal passage 1* in the head piece F communicates with the interior of the internal gear 7 and allows the airforced up by the rise of the core in the barrel D during the drilling to escape to atmosphere between the housing Eand casin B.

In the operation of the tool, the spindle A,

shaft 7), casing B and bit C rotate simultaneously, the spiral conveyor H carrying the dbris upward and out through the openings 7'. The cap piece B housing E,

head piece F and core barrel D do not rotate, but as the core'barrel is carried downwardly, the core 1 is formed and when the core has attained the desired length .the

drilling is stopped and the handle K is ma-- nipulated to partially-rotatethe cap piece B and housing E, and by reason of the rigid relationship between the upper end V of the head piece F. and the housing 1*),

rasaeea the head piece F will also be partially rotated. This has the efi'ect of moving the pin L in the slot or groove G, and unlocking parts, so that the drill and bit may be raised, leaving the barrel around the core. The inner core barrel D is thus removed from the drill through the agency of the external manual means K without removing the cut- .parts to unlock the core barrel may be per formed either whilethe drill is in operation or when idle.

Figured shows a modified form ofcut; ting bit in which the spiral conveyor J is located on the exterior surface of the bit C instead of on, the interior. This form is more suitable for use in drilling in certain kinds of material. The operation is in all respects similar to the preferred form except that the dbris is conveyed along the outside of the'bit instead of around the core barrel D.

I claim: y I a 1. A soil coring tool, comprising a rotatable spindle, an outer cutting bit connected to be rotated by said spindle, a relatively non-rotatable head piece within the upper end of the bit supported from a stationary portion of the rotating mechanism, and an inner core barrel connected to said head piece, which descends without rotatliong and encloses a core cut by the rotating 2.A soil coring tool, comprising a rotatable spindle, an outer cutting bit connected to be rotated by said spindle, a relatively non-rotatable head-piece within the upper end of the bit supported from a stationary portion of the rotating mechanism and an inner core barrel connected to said head piece, .which descends without rotating and encloses a core cut by the rotating bit and enclosed means forming a part of the outer cutting bit for conveyingthe cut tgings 1and detritus upwardly around the core arre v the bayonet ioint' connection between these i 3. A soil coring tool, comprising a 1'0 an outer cutting bit connected to be rotated by saidspindle, 'a detachable inner core barrel, a normally non-rotatable head piece for core barrel.

'5. A soil coring tool, comprising a rd tatable spindle, an outer cutting bit con-- nected to be rotated by said spindle, an inner core barrel, a normally non-rotatable head piece for said corebarrel, said core ,7

barrel being secured to said head piece by aseparable connection, a spiral conveyor between said, outer cutting bit and inner barrel and manually operated means independent of the spindle for effecting rotation of said head piece to connect and disconnect the core barrel from the head piece without exposing the inner core barrel.

6. A soil coring tool, comprising a spindle,

an outer casing having a cutting bit, said casing and bit bein connected to be rotated by said spind e, a detachable inner core barrel, a normally non-rotatable head piece for saidcore barrel, a spiral conveyor on the inner'wall of. said .cutting bit and manually operated means for effecting partial rotation of said head piece relatively to the core barrel to connect and disconnect the core barrel from the head piece, withoutexposing said inner core barrel.

:1 spindle mounted in said cap, having an internal gear, a driving connection betweensaid spindle and gear for-effecting rotation of said casing, a housing interposed between said casing and cap, a head piece secured in said housing, an outer rotatable cylindrical cutting bit detachably mounted on said casing, aspiral conveyor formed on said bit, an detachably secured to said head piece and a casing means'for imparting simultaneous rotative inner core barrelspecification.

movement to the cap, housing and head piece relatively to the core barrel and independently of the rotation imparted bysthe spindle, whereby the core barrel may be locked to or disengaged from the head piece.

8. A soil coring tool comprising a normally stationary cap, a spindle rotatably mounted in said cap, a cas1ng having aninternal gear, a driving connection between said spindle and gear for efi'ectmg rotation of said casing, a norm-ally non-rotatable housing interposed between said casing and cap, a head piece secured in said housing, a-

rotatable cylindrical cutting bit miounted on said casing, a spiral conveyor formed on said bit, an inner non-rotatable core barrel detachably secured to said head piece and means for imparting simultaneous rotative movement to the cap, housing and head piece relatively to the core barrel, whereby the core barrel may be locked to or released from the head piece. v

9. A soil coring tool comprising a normally stationary cap, a rotatable spindle mounted in said cap, a casing having an internal'gear, a driving connection between said spindle and gear for effecting rotation of said casing, a normally non-rotatable housing interposed between said casing and. cap and" enclosing the gear insaid casing, a head piece secured in said housing, a rotatable cylindrical cutting bitmounted on said casing, a spiral conveyor formed on the inner wall of said v bit, an inner normally non-rotatable core 7. A soil coring tool comprising a cap,-

barrel detachably secured to said head piece by a bayonet joint connection and manually rotation imparted by the spindle, whereby the core barrel may from the head piece. Y

In testimony whereof I have signed this ormnnns o.- HANSEN.

be locked to or released 

